Gas-lamp.



J. LEDERER GAS LAMP.

APPLlC/xTION FILED FEB. 8, 1913.

Patented May 4, 1915.

2 SHEETS-SHEET I.

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THE NORRIS PETERS 60.. PHOTO-LITHO.. WASHINGTON. D. C

J. LEDERER.

GAS LAMPL APPLICATION FILED FEB. 8. 1913.

Patented May 4, 1915.

2 SHEETS-SHEET 2 ETERS ca, PHOm-LITHQ. WASHINGTON, D4 C.

JOSEPH LEDERER, OF NEW YORK, N. Y.

GAS-LAMP.

Application filed. February 8, 1913.

To all whom it may concern Be it known that I, JosErH Lnonnnn, a citizenof the United States, and a resident of the city, county, and State ofNew York, and whose post-office address is 237 Lafayette street, NewYork city, New York, have invented certain new and useful Improvementsin Incandescent Gas-Lamps Furnished with One or Plural Burners, of whichthe following is a specification.

The invention resides in certain novel features concerned with thecontrol of the delivery of the Bunsen mixture to the burner nozzle ortip, by which I am enabled to regulate the mixture perfectly under allconditions, and control the delivery of the mixture to the burners.

Reference is had to the accompanying drawing, which illustrates thepreferred con struction of the device.

In these drawings Figure 1 is a vertical section of the complete lamp;Fig. 2 is an enlarged section of the gas supply cock and regulator; Fig.3 is an elevational view of the arm and pawl and ratchet for operatingthe gas cock; Fig. 4 is an enlarged section of the check; Fig. 5 is asectional plan view of Fig. 4:, on the line 55; and Fig. 6 is anenlarged detail view of the air supply device.

In Fig. 1, 10 indicates the casing of the lamp, which is of metalsuitably constructed, and carrying at its lower end a glass globe 11 inwhich the mantles 12 are located. The drawings show a plurality ofmantles, though my invention may be readily adapted to a single mantle.

The gas is supplied through a tube 14: (see Fig. 2) to a valve fitting15 which has a screw 16 thereon by which the gas flow is throttled. Thescrew 16 is fitted with a spring 17 which prevents the screw from comingloose. By adjusting this screw the gas flow to the valve 18 may beregulated. 19 is a bypass tube to supply the pilot burner 20, and 21 isa needle valve for regulating the gas flow through the pilot. The valve18 is of the ordinary plug type, and its stem 18 carries a ratchet 22(best shown in Fig. 3), with which a pawl 23 coacts. This pawl iscarried on an arm 24 which is mounted on the stem 18 One end of the armis furnished with a weight 24* and other end of the arm has a chain orcord 25 attached thereto. This weight causes the arm to hang normally invertical position, and the arm is furnished with a lug 2 1; whichSpecification of Letters Patent.

Patented May 4, 1915.

Serial No. 747,015.

is adapted to engage a lug 26 (see dotted lines in Fig. 2) on the valvefitting 15, by means of which lugs 24 and '26 the movement of the arm islimited. By pulling down on the cord or chain 25 the arm is given aquarter turn, and this, through the pawl 23 and ratchet 22 gives aquarter turn to the valve 18. It will therefore be seen that by rapidlypulling and releasing the cord 25 the valve 18 is given a step-by-steprotating movement which alternately opens and closes the valve. The lampmay hang high and the corc 25 project below the lamp, so that the gasmay be conveniently turned on or oil. From the valve fitting 15 a tube27 extends down to the check casing 28 (see Figs. 4c and5). This casinghas a small opening 29in its lower end which discharges into a tube 30extending below the casing 28. Said opening 29 is controlled by aconical valve pipe 31 on the valve body 32.

The valve body 32 has its outer sides scored or grooved to permit thegas to pass by the valve, but at the same time to guide the valve bodyin its vertical movement in the casing. In the upper end of the valvebody is a pocket 33 open at the top and designed to constitute a trapfor impurities and solid matter falling from the tube 27. It willtherefore be seen that this arrangement allows a free flow of gas pastthe sides of the valve 32, but that solid impurities falling through thetube 27 will lodge in the trap 33 and will not pass into the orifice 29to clog or obstruct the same.

The vertical position of the valve body controls the position of thevalve point 31 and thereby theamount of gas passing the orifice 29 iscontrolled. This vertical position of the valve body is regulated by aneccentric pin 34 on a disk 35 which is car ried fast on a stem 36. Thepin 34: plays in a horizontal slot 37 in the valve body, and the disk 35lies in the casing 28 alongside of the valve body. Screwed into thecasing is a tube 38 which surrounds the stem 36 and projects into themetal casing 10. On the outer end of the tube 38 is a stuliing box 39which projects through an orifice in said casing 10 so that it may bereached by a pair of nippers or other tool, thus allowing for the easyreplacement of the packing, so that a thoroughly gas-tight joint ismaintained. The stem 36 projects through the striding-box 39 and isfurnished with a kerf or is otherwise adapted to receive a screw driverorother tool for turning the stem for regulating the position of thevalve 31. lt will be seen therefore that the position of gas with airadmitted to the tube 30 through air tubes 40. There are preferably threeof these air tubes 40 which extend horizontally through openings in thecasing and admit I the air from the atmosphere outside of the casings.The ends of the tubes are open and are furnished'with stoppers in theform of tubes 41 with knurled heads 42. The tubes 41 fit friction-tightin the tubes and are furnished with slots 43 for the admission of air.The knurled'heads 42 allow the easy manipulation of the stoppers, movingthem in or out, and according to the position of the stoppers more orless air is admitted through the slots 43. It will be seen, therefore,that I provide for a very nice regulation of the relative quantity ofair and gas,

forming the Bunsen mixture, and at the same time I draw the air from therelatively pure outer atmosphere, making the-Bunsen mixture as pure aspossible,which condition is highly advantageous in the operation of theBunsen burner; The tube 30 extends down to a branch fitting '44 carryingthe nipples 45 which support the mantles 12. This multiple fitting 40 isfurnished with four branches to carryv four mantles, butrit may bearranged to carryonly one mantle, as explained. For'regulating thevolume of the Bunsen mixture admitted to this fitting.

44 I provide a conical valve 46 which is carried on a stem 47 screwed inthe bottom of the fitting. By turning this stem 47 the valve 46 may bemoved up or down, toward or from the lower end of the tube 30 againstwhich the conical valve 46 is adapted to seat. In this manner thedischarge orifice from the tube 30 may be regulated, which will regulatethe volume of the Bunsen mixture admitted in the burners.

From the foregoing description it will be observed that I have providedfor the utmost nicety of regulation first, of the gas as it flows fromthe supply, second, of the relative proportions of the air and gas goinginto association to form the Bunsen mixture, and

third, of the volume of the Bunsen mixture,

allowed to pass to the burner nipples. Con-- sidering the great varietyof conditions under which an incandescent gas lamp must operate withrespect to the pressure of the gas, the quality of the gas and even thesurrounding atmospheric conditions, it will, be seen that this nicety ofregulation, is of great importance and is-a factor upon which thesuccess of the lamp largely depends.

The glass globe 11 is held in an annulus47 by means of the usual screws,and the'annulus has fastened thereto anv arm 48 which carries a pin 49,and thispin is adapted to fit in the lower end of a slot 50 formed in anarm 51 fastened to the lower end of the casing 10. This constitutes ahinge for mounting the annulus 47 on the casing, and at the same timethis hinge may be readily disconnected by moving the arm 48 and pin 49upward to disengage the pin from the slot 50. To hold the annulus inraised or operative position I provide a button 52 which is adapted toseat in the enlarged upper end of the slot 53, formed in a ing 54'projecting from the lower end of the casing. This button 52 is carriedon a pin 55 which is fastened to the annulus 47, and a spring 56 18arranged around the outerend of the pin I serving yieldingly to pressthe button 52 inward. To disconnect this latch it is only necessary todraw outward the button 52 and.

then the inner end of the button will clear the upper endof the slot 58and allow the annulus to swing down around thepin 49. The engagement ofthe base of the latch is effected bya reversal of this operation.

Having thus described my invention, what I claim is: V

A gas lamp having a mixture. supply tube provided with a discharge endhaving a valve seat, a fitting at the discharge end to carry the gas tothe burners, and a valve disposed centrally of the fitting andcooperating with the valve seat, the valve being coni cal to spread thegas evenly to said burners.

In witness whereof I have signed my 7 name to this specification in thepresence of two subscribing witnesses this 30th day of December, 1912.

JOSEPH LEDERER.

Witnesses: v

SUSAN DUBIN, CATHERINE PECQUEUR.

Copies of this patent may be obtained for five cents each, byaddressingthe Commissioner of mafia;

Washington, .D. G. a

